Developer Tools & Repos Agent Skills for HTTP / API

Generates Chain of Responsibility pattern for PHP 8.4.

Design an API versioning and deprecation policy — semver rules, sunset timelines, and communication channels.

Write a changelog entry or release notes for an API version — breaking changes, new features, fixes.

Draft or update release notes and changelog entries from repository evidence.

This skill should be used when the GM needs to help players create Daggerheart characters, select a class/ancestry/community, define…

Use when choosing Core Data vs SwiftData, setting up the Core Data stack, modeling relationships, or implementing concurrency patterns…

Verifies required tools (Quarto, uv, Python, R, Stata, TeX) and Jupyter kernels are installed.

System architecture and API design with multi-AI consensus — use for design reviews and new subsystems

Automates code quality verification and repository stability checks before every git commit.

Use when the user asks "is AGP 8.2 compatible with Gradle 8.4", "will this Kotlin version work with my AGP", "what Gradle version does…

Validates all code changes before committing by running format, lint, type, and unit test checks.

Roll back to a previous checkpoint via git — use when a change went wrong and you need to revert

Manages the 'ChronoShift' (Age-Shift) strategy game, tracking the Age Bank, resolving dice mechanics for claiming years, and executing the…

Use when designing an electronic circuit from requirements, choosing topology or regulator type, selecting component values, planning…

Implement or modify Ruby code using the claude-agent-sdk gem.

Use when managing agent context, memory, and conversation state in Claude AI agents using the Agent SDK.

This skill provides comprehensive knowledge for working with the Anthropic Messages API (Claude API).

Claude Code ecosystem expertise. Modules: CLI tool (setup, slash commands, MCP servers, hooks, plugins, CI/CD), extensibility (agents…

Expert Git workflow management for Claude Code sessions with branch naming conventions, push retry logic, conflict resolution, and PR…

Activate when the user wants to build a Claude plugin, create a Claude skill, make a Claude agent, structure a Claude Code plugin, says…

Standardizes the creation of high-quality SKILL.md files to enhance Claude's domain-specific task execution.